35116111 ÷ 399 
The aim is to understand the frequency of 399 in 35116111.

Moving on to step 1:
The number 399 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 399

Moving on to step 2:
When dividing 35 by 399, we get 0 with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 399

Step 3:
If we divide 351 by 399, we get 0 and a remainder of 351.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 351 leaves us with 351.
Include the next digit (1) from the dividend after 351, then repeat: 3511 / 399

Going ahead to step 4:
When dividing 3511 by 399, we get 8 with a remainder of 319.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 3192 from 3511 and we're left with 319.
Take the next digit (6) from the dividend and append it to 319, then repeat: 3196 / 399

Step 5:
399 goes into 3196 8 times with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 88.0
Deduct 3192 from 3196 and we're left with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 399

Step 6:
If we divide 41 by 399, we get 0 and a remainder of 41.
Put 0 as the next digit of the answer. 
Result so far: 880.0
Deduct 0 from 41 and we're left with 41.
Grab the next digit (1) from the dividend, add it to 41, then carry on: 411 / 399

Moving on to step 7:
If we divide 411 by 399, we get 1 and a remainder of 12.
The next digit of our result is 1. 
Result so far: 8801.0
If we take 399 away from 411, we end up with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 399

Let's proceed to step 8:
399 can be fit into 121 0 times, resulting in a remainder of 121.
Write down 0 as next digit of the result. 
Result so far: 88010.0
If we subtract 0 from 121, we get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Let's proceed to step 9:
1210 divided by 399 is 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 88010.3
If we subtract 1197 from 1210, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 10:
If we divide 130 by 399, we get 0 and a remainder of 130.
Put 0 as the next digit of the answer. 
Result so far: 88010.3
Deduct 0 from 130 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 11:
When dividing 1300 by 399, we get 3 with a remainder of 103.
The number 3 becomes the next digit in our result. 
Result so far: 88010.303
Deduct 1197 from 1300 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 12:
399 can be fit into 1030 2 times, resulting in a remainder of 232.
The next digit of our result is 2. 
Result so far: 88010.3032
The remainder is 232 after subtracting 798 from 1030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 13:
2320 divided by 399 is 5 with a remainder of 325.
The next digit of our result is 5. 
Result so far: 88010.30325
Subtracting 1995 from 2320 leaves us with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Advancing to step 14:
The number 399 fits into 3250 8 times, leaving a remainder of 58.
Write down 8 as next digit of the result. 
Result so far: 88010.303258
If we take 3192 away from 3250, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 15:
580 divided by 399 is 1 with a remainder of 181.
Record the quotient 1 as the next digit in the result. 
Result so far: 88010.3032581
Deduct 399 from 580 and we're left with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Moving on to step 16:
399 can be fit into 1810 4 times, resulting in a remainder of 214.
The number 4 becomes the next digit in our result. 
Result so far: 88010.30325814
If we take 1596 away from 1810, we end up with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Our division results in 88010.30325814 with a remaining 2.14e-07.